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Controlled synthesis of core-mesoporous shell from biomass sustainable N-doped hollow carbonaceous nanospheres

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Nano Research 2014年第12期7卷 1809-1819页

作者： Chuanlong Han Shiping Wang Jing Wang mingming Li jiang Deng Haoran Li YongWang Carbon Nano Materials Group Center for Chemistry of High-performance and Novel Materials Department of Chemistry ZhejiangUniversity Hangzhou 310028 China

Encompassing ecological and economic concerns, the utilization of biomass to produce carbonaceous materials has attracted intensive research and industrial interest. Using nitrogen containing precursors could realize an in situ and homogeneous incorporation of nitrogen into the carbonaceous materials with a controlled process. Herein, N-doped hollow core-disordered mesoporous shell carbonaceous nanospheres （HCDMSs） were synthesized from glucosamine hydrochloride （GAH）, an applicable carbohydrate-based derivative. The obtained HCDMSs possessed controlled size （-450-50 nm） and shell thickness （-70-10 nm）, suitable nitrogen contents （-6.7-4.4 wt.%）, and Brunauer-Emmett-Teller （BET） surface areas up to 770 m^2.g^-1. These materials show excellent electrocatalytic activity as a metal-free catalyst for the oxygen reduction reaction （ORR） in both alkaline and acidic media. Specifically, the prepared HCDMS-1 exhibits a high diffusion-limited current, and superior durability and better immunity towards methanol crossover and CO poisoning for ORR in alkaline solution than a commercial 20 wt.% Pt/C catalyst.

关键词： n-doped biomass hollow nanospheres oxygen reduction reaction

Nonequilibrium hot-electron-induced wavelength-tunable incandescent-type light sources

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Photonics Research 2020年第1期8卷 91-102页

作者： ZHIPENG SUN mingming jiang WANGQI MAO CAIXIA KAN CHONGXIN SHAN DEZHEN SHEN State Key Laboratory of Luminescence and Applications Changchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of SciencesChangchun 130033China University of Chinese Academy of Sciences Beijing 100049China College of Science Nanjing University of Aeronautics and AstronauticsNanjing 210016China School of Physics and Engineenng Zhengzhou University.Zhengzhou 450052China

The collective oscillation of electrons located in the conduction band of metal nanostructures being still energized,with the energy up to the bulk plasmon frequency,are called nonequilibrium hot *** can lead to the state-filling effect in the energy band of the neighboring ***,we report on the incandescent-type light source composed of Au nano rods decorated with single Ga-doped ZnO microwire(AuNRs@ZnO:Ga MW).Benefiting from Au nanorods with controlled aspect ratio,wavelength-tunable incandescent-type lighting was achieved,with the dominating emission peaks tuning from visible to near-infrared spectral *** intrinsic mechanism was found that tunable nonequilibrium distribution of hot electrons in ZnO:Ga MW,injected from Au nanorods,can be responsible for the tuning emission *** from the modification over the composition,bandgap engineering,doping level,etc.,the realization of electrically driving the generation and injection of nonequilibrium hot electrons from single ZnO:Ga MW with Au nanostructure coating may provide a promising platform to construct electronics and optoelectronics devices,such as electric spasers and hot-carrier-induced tunneling diodes.

关键词： nonequilibrium collective light

广州市天河区17例猴痘病例临床及流行病学特征分析

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华南预防医学 2024年第6期50卷 520-523页

作者：叶新蔡文锋蒋明明郭伟文向敏洁戴栽有郭小亮柳勤广州市天河区疾病预防控制中心广东广州510655

目的分析广州市天河区2023年1—12月人感染猴痘病毒确诊病例的临床及流行病学特征,探讨疫情防控策略。方法整理广州市天河区2023年1—12月由广州市内各医疗卫生机构发现报告居住在天河区的17例猴痘确诊病例的临床和流调资料,通过描述... 详细信息

目的分析广州市天河区2023年1—12月人感染猴痘病毒确诊病例的临床及流行病学特征,探讨疫情防控策略。方法整理广州市天河区2023年1—12月由广州市内各医疗卫生机构发现报告居住在天河区的17例猴痘确诊病例的临床和流调资料,通过描述性方法分析病例的流行病学特征,同时采集病例咽拭子、疱疹液以及环境样品,通过实时荧光定量PCR法进行猴痘病毒核酸检测。结果 17例人感染猴痘病毒确诊病例均为男性,年龄平均(28.88±5.77)岁,均为男男同性性行为者。病例的主要临床症状以皮疹(17例,100.00%)、发热(12例,70.59%)、淋巴结肿大(7例,41.18%)等症状为主,同时出现发热、皮疹和淋巴结肿大者4例(23.53%),同时出现发热和皮疹者12例(70.59%),同时出现皮疹和淋巴结肿大者7例(41.18%)。所有病例发病前21 d均有非固定伴侣男男同性性行为史,末次可疑高危暴露到出现可疑症状的时间间隔为2—16 d,中位间隔时间为6.00(3.50,8.00)d。从发热到出现皮疹症状的时间间隔为0~1 d,平均时间间隔为0.2 d。结论人感染猴痘病毒的高危人群为男男同性性行为者,感染后症状以发热、皮疹及腹股沟淋巴结肿大等症状为主。感染者的感染方式可能与男男同性性行为暴露有关,发病早期症状不明显和较轻,可能影响漏诊或误诊。

关键词：猴痘淋巴结肿大流行病学特征男男同性性行为者

Research progresses of nanomaterials as lubricant additives

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Friction 2024年第7期12卷 1347-1391页

作者： Zhengquan jiang Yankun SUN Bokang LIU Laigui YU Yuping TONG mingming YAN Zhongzheng YANG Yongxing HAO Linjian SHANGGUAN Shengmao ZHANG Weihua LI School of Materials Science and Engineering North China University of Water Resources and Electric PowerZhengzhou 450045China Institute of Special Friction and Lubricating Materials North China University of Water Resources and Electric PowerZhengzhou 450045China Nanomaterials Engineering Research Center Henan UniversityKaifeng 475001China School of Mechanical Engineering North China University of Water Resources and Electric PowerZhengzhou 450045China

Friction and wear are unavoidable in mechanical *** use of lubricants with nano-additives can effectively reduce friction and wear,which is of great significance to saving energy and protecting the *** present,great progress has been made in the scientific research and industrial application of nano-additives for *** paper mainly introduces the types of nano-additives for lubricants(such as carbon nanomaterials,nano-metals,nano-oxides,sulfides,complexes,polymers,etc.),the tribological properties of lubricants with different components of nano-additives,and the lubrication mechanisms of the nano-additives(including tribofilm formation,rolling ball bearing effect,repairing effect,polishing effect,and synergistic effect).It also deals with the dispersion of nano-additives in lubricants and the influences of their particle size and microstructure on the tribological properties of *** review outlines the performance requirements of nano-additives in different lubrication states,discusses the use of nano-additives in challenging working conditions,and identifies various industrial oil nano-additives with reference to the appropriate options in diverse working ***,the existing problems of nano-additives and their application prospects are *** review,hopefully,would help to shed light on the design and synthesis of novel high-performance nano-additives and promote their application in engineering.

关键词： nanomaterials lubricant additive lubrication mechanism research progress

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特异标记优质柞蚕新品种“L青”选育

北方蚕业 2024年第3期45卷 19-22页

作者：万军姜明明王大雨张洋张景龙刘剑峰刘宝毓吉林省蚕业科学研究院吉林吉林132012

柞蚕新品种“L青”是以“吉黄一化”和“选大一号”为亲本材料,利用杂交和系统选育手段,采用分区饲养、系统分离、定向培育及高温胁迫锻炼的方法,通过5年10代系统选育而育成的特异标记青黄蚕新品种。该品种具有耐高温、抗逆性强、杂交... 详细信息

柞蚕新品种“L青”是以“吉黄一化”和“选大一号”为亲本材料,利用杂交和系统选育手段,采用分区饲养、系统分离、定向培育及高温胁迫锻炼的方法,通过5年10代系统选育而育成的特异标记青黄蚕新品种。该品种具有耐高温、抗逆性强、杂交优势强、丰产性能稳定等特点,已在生产中得到大面积应用。春、秋季选育结果:千粒茧重分别为8.56 kg和11.53 kg,单蛾产卵量分别为310粒和303粒,全茧量分别为9.56 g和11.38 g,茧层率分别为9.40%和11.85%。

关键词：柞蚕新品种 L青

血清异常凝血酶原和甲胎蛋白在布-加综合征合并肝细胞癌中的诊断价值

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安徽医药 2024年第11期28卷 2264-2268页

作者：刘龙郭潇赵云龙蒋明明刘洪涛王文亮祖茂衡徐浩徐州医科大学研究生学院江苏徐州221004 淮安市淮安医院介入科江苏淮安223200 徐州医科大学附属医院介入放射科江苏徐州221006

目的探讨血清异常凝血酶原(PIVKA-Ⅱ)、甲胎蛋白(AFP)在布-加综合征(BCS)合并肝细胞癌(HCC)中的诊断价值。方法收集2015年6月至2021年10月徐州医科大学附属医院收治的43例BCS合并HCC病人和139例单纯BCS病人临床资料,采用倾向性评分匹配... 详细信息

目的探讨血清异常凝血酶原(PIVKA-Ⅱ)、甲胎蛋白(AFP)在布-加综合征(BCS)合并肝细胞癌(HCC)中的诊断价值。方法收集2015年6月至2021年10月徐州医科大学附属医院收治的43例BCS合并HCC病人和139例单纯BCS病人临床资料,采用倾向性评分匹配法平衡两组特征差异,匹配后BCS合并HCC组31例、单纯BCS组53例。比较血清PIVKA-Ⅱ和AFP水平对BCS合并HCC的诊断效能,分析其与病人病变特征的关系。结果BCS合并HCC组血清PIVKA-Ⅱ[247(77,5259)AU/L比17(13,22)AU/L]和AFP水平[444.20(12.38,5484.00)μg/L比3.35(2.16,8.43)μg/L]均显著高于BCS组(均P<0.01)。PIVKA-Ⅱ和AFP联合检测诊断BCS合并HCC的AUC高于PIVKA-Ⅱ、AFP单独检测(0.98比0.92、0.90),其中联合检测AUC较AFP单独检测差异有统计学意义(P<0.05)。在BCS合并HCC病人中,多发HCC病灶、肿瘤长径之和≥5cm、CNLCⅢ~Ⅳ期和合并门静脉瘤栓病人的PIVKA-Ⅱ分别高于单发病灶、肿瘤长径之和<5 cm、CNLCⅠ~Ⅱ期和无门静脉瘤栓的病人(均P<0.05);单发病灶病人血清PIVKA-Ⅱ(r=0.58,P=0.018)和AFP(r=0.46,P=0.035)阳性水平与肿瘤长径正相关。结论PIVKA-Ⅱ和AFP对BCS合并HCC均具有较高的诊断价值,PIVKA-Ⅱ联合AFP可提高诊断效能,且PIVKA-Ⅱ和AFP与病人病变特征密切相关。

关键词：布-加综合征癌,肝细胞合并症异常凝血酶原甲胎蛋白倾向性匹配评分

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Breaking the speed limitation of wavemeter through spectra-space-time mapping

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Light(Advanced Manufacturing) 2024年第2期5卷 33-40页

作者： Zheng Gao Ting jiang mingming Zhang Yuxuan Xiong Hao Wu Ming Tang Wuhan National Laboratory for Optoelectronics(WNLO)and Next Generation Internet Access National Engineering Laboratory(NGIA) School of Optical and Electronic InformationHuazhong University of Science and TechnologyWuhan 430074China

Speckle patterns generated by the intermodal interference of multimode fibers enable accurate broadband wavelength ***,the measurement speed is limited by the frame rate of the camera that captures the *** propose a compact and cost-effective ultrafast wavemeter based on multimode and multicore fibers,which employs spectral-spatial-temporal *** speckle patterns generated by multimode fibers enable spectral-to-spatial mapping,which is then sampled by a multicore fiber into a pulse sequence to implement spatial-to-temporal mapping.A high-speed single-pixel photodetector is employed to capture the pulse sequence,which is analysed using a multilayer perceptron to estimate the *** feasibility of the proposed wavelength estimation method is experimentally verified,achieving a measurement rate of 100 MHz with a resolution of 2.7 pm in a 1 nm operation bandwidth.

关键词： Speed Wavemeters Spectra

“精干化”:中共“党团”领导机制演变研究(1921—1945)

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安徽史学 2023年第3期 84-91页

作者：江明明安徽大学历史学院安徽合肥230601

“党团”是中共领导非党组织的重要制度设计,在革命实践中党团逐渐由临时机构变为常设组织,由党支部和上级党团共同领导变为不受二者直接领导的独立机构。党团成立范围由非党组织的机关调整为非党组织的领导机关,党团成员由非党组织中... 详细信息

“党团”是中共领导非党组织的重要制度设计,在革命实践中党团逐渐由临时机构变为常设组织,由党支部和上级党团共同领导变为不受二者直接领导的独立机构。党团成立范围由非党组织的机关调整为非党组织的领导机关,党团成员由非党组织中的全体中共党员调整为担负领导责任的部分中共党员。党团领导机制演变中的这一“精干化”过程,展现了中共制度调适和规范党政关系的努力。

关键词：党团中国共产党精干化党政关系

Electrically driven single microwire-based single-mode microlaser

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Light(Science & Applications) 2022年第8期11卷 1799-1810页

作者： Xiangbo Zhou mingming jiang Kai Xu Maosheng Liu Shulin Sha Shuiyan Cao Caixia Kan Da Ning Shi College of Physics MIIT Key Laboratory of Aerospace Information Materials and PhysicsKey Laboratory for Intelligent Nano Materials and DevicesNanjing University of Aeronautics and AstronauticsNo.29 Jiangjun RoadNanjing211106China

Engineering the lasing-mode oscillations effectively within a laser cavity is a relatively updated attentive study and perplexing issue in the field of laser physics and applications. Herein, we report a realization of electrically driven single-mode microlaser, which is composed of gallium incorporated zinc oxide microwire (ZnO:Ga MW) with platinum nanoparticles (PtNPs, d ~ 130 nm) covering, a magnesium oxide (MgO) nanofilm, a Pt nanofilm, and a p-type GaN substrate. The laser cavity modes could resonate following the whispering-gallery mode (WGM) among the six side surfaces by total internal reflection, and the single-mode lasing wavelength is centered at 390.5 nm with a linewidth of about 0.18 nm. The cavity quality factor Q is evaluated to about 2169. In the laser structure, the usage of Pt and MgO buffer layers can be utilized to engineer the band alignment of ZnO:Ga/GaN heterojunction, optimize the p-n junction quality and increase the current injection. Thus, the well-designed device structure can seamlessly unite the electron-hole recombination region, the gain medium, and optical microresonator into the PtNPs@ZnO:Ga wire perfectly. Such a single MW microlaser is essentially single-mode regardless of the gain spectral bandwidth. To study the single-mode operation, PtNPs working as superabsorber can engineering the multimode lasing actions of ZnO:Ga MWs even if their dimensions are typically much larger than that of lasing wavelength. Our findings can provide a straightforward and effective scheme to develop single-mode microlaser devices based on one-dimensional wire semiconductors.

关键词： mode lasing cavity